JP4093451B2 - Hazardous substance removal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for removing harmful substances for detoxifying incinerated ash etc. by thermally decomposing harmful substances contained in incinerated ash, medical waste, organic waste vehicles, contaminated soil, etc. in a crucible. Is.
[0002]
[Prior art]
Conventionally, there are various harmful substance removing devices for removing harmful substances such as PCBs contained in incinerated ash, medical waste, organic waste, contaminated soil, and the like. Among the conventionally known hazardous substance removal equipment, the high-temperature gasification melting furnace that burns the object to be treated containing the hazardous substance at a high temperature and vaporizes and removes the harmful substance from the object to be treated removes the harmful substance safely and reliably. It is known that peripheral devices are equipped with excellent devices. For this reason, the high-temperature gasification melting furnace apparatus for firing the object to be treated at a high temperature has attracted attention from incinerator manufacturers, local governments, and final processing companies.
[0003]
[Problems to be solved by the invention]
However, in various known harmful substance removal devices and high-temperature gasification melting furnaces, the object to be processed is heated in an aerobic state. There was the disadvantage of releasing. Furthermore, since the high-temperature gasification melting furnace treats the workpiece at a high temperature, the refractory bricks inside the furnace are severely damaged, and the equipment itself is large, which requires labor and maintenance costs. There was a drawback of becoming higher.
[0004]
In addition, the present inventors have provided a prior art in which carbon dioxide is not generated by heating an object to be processed in a crucible in a vacuum state (Japanese Patent Publication No. 7-34902). In this prior art, the crucible is opened and closed every time the object to be processed is processed, and the temperature in the crucible is lowered every time it is opened and closed, resulting in a disadvantage that the processing efficiency is poor. Moreover, even if it tried to take out the gas extracted by heating a to-be-processed object outside with a suction device, there existed a fault that it took time to take out gas from a crucible.
[0005]
The apparatus of the present invention solves the problem between the conventional apparatuses, and heats the crucible in a sealed state where the crucible is not opened and is heated at a high pressure in a low pressure oxygen-free state to improve the processing efficiency and emit carbon dioxide. It is another object of the present invention to provide an apparatus and method for removing harmful substances that reduce the manufacturing cost by reducing the size of the apparatus and performing the heat treatment at a relatively low temperature to reduce the running cost.
Another object of the present invention is to allow gas generated by heat treatment to be easily taken out from the crucible.
[0008]
[Means for Solving the Problems]
  The hazardous substance removing apparatus of the present invention includes a crucible for storing a processing object containing a toxic substance, a heating means for heating the inside of the crucible to vaporize a toxic substance contained in the processing object, and a suction force. A suction means for generating gas, a cooling device for liquefying and collecting vaporized harmful substances, and a device provided between the suction means and the crucible for liquefying the vaporized gas, and the crucible A transfer means for connecting and removing the workpiece to and from the crucible, an upper introduction member for feeding the workpiece into the transfer means in a state that can be hermetically shut off from the outside, A lower discharge member for discharging the object to be processed from the transfer means in a state that can be shut off automaticallyA nitrogen charging means for charging nitrogen into the crucible;The crucible, the cooling device, and the suction means are in a closed state, and the suction force by the suction means is exerted on the crucible through the cooling device.The transfer means for loading and discharging the processing object are disposed on the opposite side with the crucible as a center, and the suction means is disposed on the opposite side of the transfer means for charging with the crucible as the center.Is.
[0009]
  The hazardous substance removing apparatus of the present invention,in frontThe charging transfer means has a shaft that forms a space therein, and one end of the space of the shaft communicates with the crucible, and nitrogen from the nitrogen charging means is charged into the space. A communication hole for connecting the outside of the shaft and the space is provided around the shaft, and nitrogen from the nitrogen input means is input to the space from the outside of the shaft through the communication hole.
  The harmful substance removing apparatus of the present invention forms a spiral groove in the rotation axis direction on the inner wall of the crucible, and moves the object to be processed along the spiral groove by the rotation of the crucible. And a scraping plate for dropping the object to be processed toward the transfer means in the crucible, and the scraping plate for treating the residue after vaporizing harmful substances from the object to be processed in the crucible.AtDrop it on the clew. Further, a plurality of communication passages that are switched by switching means are provided at positions where the crucible and the cooling device communicate with each other, and cooling devices are provided as many as the communication passages. A plurality of the cooling devices are connected in series via communication pipes.
  Further, two cooling spaces are provided on the outer periphery of the crucible, and the heating means is provided in one cooling space, nitrogen is introduced, and cooling water is introduced into another cooling space. The upper introduction member and the lower discharge member are arranged on one side with respect to the crucible, and the transfer means puts the workpiece into the crucible and removes the workpiece from the crucible.
[0010]
First Embodiment of the Invention
Next, the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram of a hazardous substance removing apparatus according to the present invention. This apparatus has a substantially cylindrical main body 10, and members outside the main body 10 include a first cylinder member 12, a second cylinder member 14, a first end face member 16, and a second end face member 18. Although the first cylinder member 12 and the second cylinder member 14 are separated from each other in FIG. 1, they may be a single member. The apparatus further includes a base 20, a motor 22 capable of reversible rotation is fixed to the base 20, and a rotary shaft 24 of the motor 22 is rotatably supported by a bearing 26 fixed to the base 20. To do. Two wheels 28 are fixed to the rotary shaft 24 at an interval. The wheels 28 are engaged with the first end face member 16 and the second end face member 18 of the main body 10, and the main body 10 is driven by the motor 22. It is rotated at a predetermined position.
[0011]
A cylindrical crucible 30 is provided inside the main body 10, and both ends of the crucible 30 are fixed to the inner walls of the first end face member 16 and the second end face member 18, and the crucible 30 rotates together with the main body 10. It is set as follows. One end of the cylindrical crucible 30 is closed by the first end face member 16. A spiral groove 32 is formed on the inner wall of the cylindrical crucible 30 so as to proceed in the cylindrical axial direction.
A workpiece entry / exit device 34 that passes through the center of the second end surface member 18 of the main body 10 and reaches the inside of the crucible 30 is fixed to the base 20. The workpiece entry / exit device 34 includes a cooling member 36 that penetrates the second end surface member 18 in and out and communicates with the internal space of the cylindrical crucible 30, and a support member 38 that supports the cooling member 36. Become. The cooling member 36 fixed to the base 20 is set so as to maintain a hermetically sealed state at the joint portion with the rotating second end face member 18. In the cooling member 36, cooling water is supplied from a cooling water circulation means (not shown) via a support member 38, and the cooling water circulated through the cooling member 36 circulates through the support member 38. Returned to the means. Since this technical content is publicly known, the description thereof is omitted here.
[0012]
Inside the main body 10 and outside the cylindrical crucible 30, a first space 40 that is a cooling space for containing gas is formed on the first end face member 16 side, and on the second end face member 18 side. A second space 42 that is a cooling space for accommodating the cooling water is formed. In the vicinity of the first end face member 16 in the first space 40, a high frequency coil 44 is provided as a heating means for heating the crucible 30 over the outer periphery of the crucible 30. The high-frequency coil 44 heats the workpiece to be introduced into the crucible 30 to about 800 ° C. according to the type of the workpiece, and the heating temperature can be freely adjusted.
[0013]
The cooling means 46 and the nitrogen charging means 48 are attached to the outside of the first end face member 16 and rotate together with the first end face member 16 (main body 10). The cooling means 46 is for cooling the workpiece in the crucible 30 by introducing cooling water therein according to the timing. The nitrogen input means 48 supplies nitrogen into the first space 40 and fills the first space 40 with nitrogen. The nitrogen charging means 48 further supplies a small amount of nitrogen intermittently to the internal space of the crucible 30 via the first end face member 16.
[0014]
A horizontal space 56 is formed in the cooling member 36 and the support member 38 to connect them, and a screw 50 as a transfer means is provided in the space 56. The screw 50 has a shape in which a spiral rib or guide is provided on the outer periphery of the shaft, and the workpiece is moved along the space between the spiral rib or guide by the rotation of the screw 50. It is. One end of the cooling member 36 and one end of the screw 50 are exposed in the internal space of the cylindrical crucible 30. The screw 50 extends from the cooling member 36 to the inside of the crucible 30. A screw motor 52 for rotating the screw 50 in a reversible direction is provided at the other end opposite to the end of the screw 50 on the crucible 30 side. On the internal space side of the crucible 30 in the cooling member 36, a fried plate 54 for dropping an object to be processed attached to the inner wall of the crucible 30 is attached.
[0015]
A tubular upper introduction member 58 that communicates above the space 56 and a tubular lower discharge member 60 that communicates below the space 56 are connected and fixed to the support member 38 so as to communicate with the screw motor 52 side of the space 56. ing. The upper introduction member 58 introduces the workpiece into the space 56 in an airtight manner, and the lower discharge member 60 discharges the workpiece from the space 56 in an airtight manner. The upper introduction member 58 is sequentially provided with a receiving hopper 62 for storing an object to be processed at its upper end, a rotary valve 64 at a lower position, a vacuum correction chamber 66 at a lower position, and a rotary valve 68 at a lower position. Is. The inside of the vacuum correction chamber 66 is evacuated by a vacuum device 70. That is, the object to be processed that has entered the vacuum correction chamber 66 is maintained in a vacuum state, and the airtightness of the space 56 is maintained when the object to be processed is introduced into the space 56. The lower discharge member 60 is provided with a rotary valve 72, a vacuum correction chamber 74 at a lower position thereof, and a rotary valve 76 at a lower position in that order from the upper side to the lower side, and the lower end of the lower discharge member 60 is discharged. In communication with the tank 78. The vacuum correction chamber 74 is also evacuated by the vacuum device 70. That is, before the residue of the object to be processed is discharged from the space 56 to the discharge tank 78, the vacuum correction chamber 74 is evacuated so that the airtightness of the space 56 is maintained.
[0016]
The space 56 located in the support member 38 communicates with two communication pipes (communication passages) 80 and 81 via a switching valve 79, and the two communication pipes 80 and 81 communicate with the cooling container 82. . The switching valve 79 communicates either the communication pipe 80 or the communication pipe 81 with the space 56 of the support member 38. The cooling container 82 is connected in series with traps 86a, 86b, 86c, which are cooling devices, via communication pipes 84a, 84b, 84c, and the last trap 86c in series serves as a suction means via a communication pipe 88. In communication with the vacuum pump 90. The cooling vessel 82 further connects the traps 94a, 94b, 94c, which are cooling devices, in series via communication pipes 92a, 92b, 92c, and the last trap 94c in series is suction means via the connection pipe 96. As a vacuum pump 98.
[0017]
The cooling vessel 82 is for cooling the gas introduced into the inside thereof (cooled to about 200 ° C. to 600 ° C. by cooling water passing through the cooling means 36) to about 60 ° C. to 70 ° C. is there. The traps 86a, 86b, 86c and traps 94a, 94b, 94c are for liquefying and collecting the gas cooled to about 60 ° C. to 70 ° C. at a low temperature such as 2 ° C., for example, the trap 86a, It is desirable that the cooling temperature is different so that the substance liquefied by 94a, the substance liquefied by the traps 86b and 94b, and the substance liquefied by the traps 86c and 94c are different from each other. Although FIG. 1 shows a state in which three traps 86a, 86b, 86c and three traps 94a, 94b, 94c are connected in series, the number of traps connected in series is not limited to three.
[0018]
The communication pipes 84a, 84b, 84c, 88 communicate with the upper space of the cooling vessel 82 and the plurality of traps 86a, 86b, 86c, and the vacuum pressure (negative pressure) generated by the vacuum pump 90 is plural. It is set so as to reach the communication pipes 80 and 81 through the traps 86c, 86b and 86a and the cooling vessel 82. The communication pipes 92a, 92b, 92c, 96 communicate with the cooling vessel 82 and the upper space of the plurality of traps 94a, 94b, 94c, and the vacuum pressure (negative pressure) created by the vacuum pump 98 is The plurality of traps 86c, 86b, 86a and the cooling vessel 82 are set so as to reach the communication pipes 80, 81.
Any one of the connection pipes 80 and 81 communicates with the space 56 for accommodating the screw 50 via the lower discharge member 60 via the switching valve 79, and the space 56 communicates with the internal space of the crucible 30. When the pump 90 or the vacuum pump 98 is operated, the vacuum pressure reaches a low pressure in the inner space of the crucible 30. That is, the vacuum pumps 90 and 98 communicate with the inside of the crucible 30 in a sealed state (a state that is secretly shut off).
[0019]
Next, decomposition of the workpiece will be described.
The rotary valve 64 is opened from the receiving hopper 62 in which the workpiece is placed, and a predetermined amount of the workpiece is supplied to the vacuum correction chamber 66. Thereafter, the rotary valve 64 is closed and the object to be processed is evacuated by the vacuum device 70 in the vacuum correction chamber 66, and then the rotary valve 64 is opened and the object to be processed in a vacuum shape is placed on the screw 50. To drop.
At this time, the switching valve 79 is switched to connect the communication pipe 80 and the space 56 of the support member 38, and the vacuum pump 90 is operated to apply the vacuum pressure of the vacuum pump 90 to the internal space of the crucible 30. Although the vacuum pressure is in the vacuum pump 90, the pressure in the inner space of the crucible 30 is a low pressure close to the vacuum pressure. Further, the screw motor 52 is operated to rotate the screw 50, and the motor 22 is operated to rotate the main body 10 and the crucible 30.
[0020]
The object to be processed that has fallen on the screw 50 moves on the surface of the screw 50 by the rotation of the screw 50 and is put into the crucible 30. The object to be processed put into the crucible 30 moves toward the first end face member 16 along the spiral groove 32 along with the rotation of the crucible 30 (main body 10). When the workpiece reaches a position close to the first end face member 16, the workpiece is heated by the high frequency coil 44. The high-frequency coil 44 is heated at a temperature (for example, 240 ° C. to 800 ° C.) that vaporizes harmful substances contained in the object to be processed in the crucible 30. The temperature heated by the high frequency coil 44 is adjusted in accordance with the type of harmful substance contained in the object to be processed.
As a result, the object to be processed is heated in the crucible 30 at a high temperature by the high-frequency coil 44 in a reduced pressure state due to the low pressure created by the vacuum pump 90.
[0021]
The object to be processed is heated by the high frequency coil 44, and harmful substances contained in the object to be processed are decomposed and vaporized. For example, oils such as benzene, toluene and xylene vaporize when the temperature reaches 240 ° C or higher. Further, chlorine contained in the object to be processed is vaporized when the temperature is 300 ° C. or higher. For this reason, the high frequency coil 44 first heats the object to be processed at a temperature equal to or lower than the temperature at which chlorine vaporizes, and after the heating is finished, heats the object to be processed at a temperature equal to or higher than the temperature at which chlorine vaporizes. When the object to be treated is heated at a temperature at which chlorine is not vaporized (for example, 240 ° C. to 290 ° C.), oil such as benzene, toluene, xylene, etc. is vaporized from the object to be treated.
[0022]
After oil such as benzene, toluene or xylene contained in the object to be processed is sufficiently vaporized in the crucible 30, the vaporized gas is separated from the crucible 30 by the vacuum pressure generated by the vacuum pump 90. The force sucked by the vacuum pump 90 through the space 56, the connecting pipe 80, the cooling vessel 82, and the traps 86a, 86b, 86c is applied. However, it takes time for the gas generated in the crucible 30 to be discharged from the crucible 30 with this suction force alone.
[0023]
For this reason, a small amount of nitrogen is intermittently or continuously injected into the crucible 30 from the nitrogen introducing device 48. For example, about 1 cc of nitrogen is injected every second. Nitrogen injected into the crucible 30 expands due to the high temperature in the crucible 30. Oils such as benzene, toluene, and xylene vaporized from the substance contained in the object to be processed are pushed by the nitrogen that is injected into the crucible 30 and expanded, and sucked by the vacuum pump 90 and directed to the vacuum pump 90. Moved. Further, by sequentially introducing nitrogen into the crucible 30, even if the crucible 30 initially contains a little oxygen, the oxygen disappears from the crucible 30, and the object to be processed is in an oxygen-free state. It will be heated. In this way, by introducing a small amount of nitrogen into the crucible 30, the introduced nitrogen can move the gas generated in the crucible 30 and can be smoothly taken out from the crucible 30. The nitrogen input position is preferably on the opposite side of the vacuum pump 90 with the vaporized gas as the center. In addition, in the case of gases other than nitrogen (oxygen, hydrogen, carbon dioxide), troubles occur, and therefore, the gas to be introduced into the crucible 30 is preferably nitrogen from the viewpoint of economy.
[0024]
The gas vaporized from the substance contained in the object to be processed in the crucible 30 passes from the crucible 30 through the space 56 of the support member 38 and the communication pipe 80 by the suction force of the vacuum pump 90 and the nitrogen expanded in the crucible 30. It reaches the cooling container 82. The gas vaporized in the crucible 30 reaches the space 56 of the support member 38 from the crucible 30 by the cooling water in the cooling member 36, the nitrogen in the first space 40, and the cooling water in the cooling means 46. , Cooled to some extent.
The gas that reaches the cooling container 82 is cooled to about 60 ° C. to 70 ° C., and then cooled by traps 86a, 86b, and 86c. Stored in. The vaporized substance obtained by decomposing the harmful substances is liquefied before reaching the vacuum pump 90, and only clean air is discharged from the vacuum pump 90. Substances stored in the traps 86a, 86b, 86c can be separated into each substance and reused as a recycled material.
[0025]
After the object to be treated is sufficiently heated at a temperature at which chlorine is not vaporized to remove oil and the like, the heating temperature of the high-frequency coil 44 is increased, and the object to be treated is heated at a temperature at which chlorine is vaporized (for example, 300 ° C. to 800 ° C.). . At the same time, the switching valve 79 is switched to connect the communication pipe 81 and the space 56 of the support member 38. Further, the vacuum pump 98 is operated. When a workpiece is heated at a temperature at which chlorine vaporizes, chlorine vaporizes from the workpiece. After the chlorine contained in the workpiece is sufficiently vaporized in the crucible 30, the vacuum pressure (negative pressure) of the vacuum pump 98 is applied to the crucible 30 and a small amount of nitrogen is intermittently or continuously supplied from the nitrogen introduction device 48. Inject into the crucible 30. The vaporized chlorine is moved toward the vacuum pump 98 by the nitrogen injected into the crucible 30 and expanding due to the high temperature and the suction force of the vacuum pump 98.
[0026]
That is, chlorine vaporized in the crucible 30 reaches the cooling vessel 82 through the connection pipe 81, is cooled to about 60 ° C. to 70 ° C. by the cooling vessel 82, and is further cooled by traps 94a, 94b, 94c. The vaporized substance containing chlorine is liquefied by traps 94a, 94b and 94c and stored in the traps 94a, 94b and 94c. The vaporized substance obtained by decomposing the harmful substances is liquefied before reaching the vacuum pump 98, and only clean air is discharged from the vacuum pump 98. The substances stored in the traps 94a, 94b, 94c can be separated into each substance and reused as a recycled material.
The reason why the substance containing chlorine is divided into the substance containing chlorine is to prevent dioxin from being generated when the substance containing chlorine is mixed with other substances.
[0027]
The residue of the object to be processed, which has been made harmless by decomposing harmful substances by heating, remains in the crucible 30. Thereafter, when the rotation of the motor 22 is reversed and the main body 10 is rotated in the reverse direction, the detoxified residue moves along the spiral groove 32 of the crucible 30 through the crucible 30 to the second end face member 18 side. The moved residue is peeled off from the inner wall of the crucible 30 by the scraping plate 10 fixed to the cooling member 36 and dropped onto the screw 50. Here, when the screw 50 is rotated in the reverse direction, the detoxified residue moves to the screw motor 52 side in the space 56 along the surface of the screw 50. The detoxified residue that has moved through the space 56 is then dropped into the lower discharge member 60. The residue dropped on the lower discharge member 60 is introduced into the discharge tank 78 through the discharge vacuum correction chamber 74 and stored therein.
[0028]
Although the number of communication pipes that communicate with the cooling container 82 via the switching valve 79 is two (communication pipes 80 and 81), it may be three or more. When the number of connecting pipes is three or more, three or more passages are connected in series from the cooling vessel 82 to the trap serving as a cooling device via the connecting pipe.
[0029]
Second Embodiment of the Invention
Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 2 is an overall configuration diagram of a harmful substance removing apparatus showing another embodiment of the present invention. 2, the same reference numerals as those in FIG. 1 denote the same members.
In FIG. 1, the input position and the extraction position of the object to be processed are set on the same side with respect to the cylindrical crucible 30 of the harmful substance removing apparatus. However, in the second embodiment shown in FIG. As the center, the input position and the extraction position of the workpiece are arranged on the opposite side. The support member 100 is fixed to the first end surface member 16 to which the cylindrical crucible 30 is fixed on the side opposite to the crucible 30. A cylindrical space 102 is formed inside the support member 100, and one of the spaces 102 communicates with the inside of the crucible 30. Inside the space 102, a screw 106 is provided as a feeding transfer means that is rotated by a motor 104. The screw 106 is provided with a helical rib or guide on the outer periphery of the shaft 108. The helical rib or guide rotates the workpiece 106 in a predetermined direction by rotating the screw 106. Move.
[0030]
An upper introduction member 58 that communicates with the support member 100 from above the space 102 is connected and fixed. The upper introduction member 58 is sequentially provided with a receiving hopper 62 for storing an object to be processed at its upper end, a rotary valve 64 at a lower position, a vacuum correction chamber 66 at a lower position, and a rotary valve 68 at a lower position. Is. The inside of the vacuum correction chamber 66 is evacuated by a vacuum device 70. The upper introduction member 58 introduces the object to be processed into the space 102 in an airtight manner. When the object to be processed is introduced into the space 102, the object to be processed put into the receiving hopper 62 is in the vacuum correction chamber 66. The vacuum state is established, and the vacuum chamber 102 is put into the space 102 while maintaining the vacuum state. The object to be processed put into the space 102 is moved to the crucible 30 side by the rotation of the screw 106 and finally put into the crucible 30.
[0031]
As shown in FIG. 3, the shaft 108 of the screw 106 has a cylindrical shape having a space 110 inside. In the vicinity of the opposite end of the crucible 30 in the shaft 108 of the screw 106, as shown in FIGS. 3 and 4, there are a plurality of communication holes 112 that communicate inward and outward on one surface in a direction perpendicular to the central axis of the shaft 108. Is formed. The support member 100 is provided with a nitrogen input means 114 for supplying nitrogen, and the nitrogen supplied from the nitrogen input means 114 can be input into the internal space 110 of the shaft 108 from the communication hole 112 of the shaft 108 of the screw 106. Is arranged. The external opening of the communication hole 112 is closed by a seal member 116 except when nitrogen is supplied from the nitrogen input means 114.
[0032]
Since it is configured as described above, the object to be processed put into the receiving hopper 62 reaches the space 102 of the support member 100 from the upper introduction member 58 and is put into the crucible 30 by the rotation of the screw 106. As in the first embodiment, the object to be processed put into the crucible 30 is heated by the high-frequency coil 44 to vaporize harmful substances contained in the object to be processed. At the same time, nitrogen supplied from the nitrogen charging means 114 is intermittently introduced into the space 110 of the shaft 108 through the communication hole 112 formed in the shaft 108. That is, nitrogen is intermittently introduced into the space inside the crucible 30.
[0033]
In the second embodiment shown in FIG. 2, the workpiece input position and the extraction position are arranged on the opposite sides with the crucible 30 as the center, so the second embodiment shown in FIG. Compared with the case where the input position and the extraction position of the processing object are on the same side), the processing object can be continuously input into the crucible 30 and can be continuously discharged from the crucible 30, thereby further improving the processing efficiency. be able to.
In the second embodiment, a space 110 is formed inside the shaft 108 of the screw 106, and nitrogen is introduced into the crucible 30 from the space 110. At that time, a plurality of communication holes 112 are provided around the shaft 108, and nitrogen from the nitrogen charging means 114 is input into the space 110 of the shaft 108 from the outside of the communication holes 112. Thus, nitrogen can be intermittently introduced into the space 110 of the shaft 108 as the shaft 108 rotates.
[0034]
【The invention's effect】
As described above, according to the present invention, a harmful substance is heated at a high temperature in a low-pressure oxygen-free state in a state where the crucible is sealed, and the workpiece is automatically passed through the crucible. Therefore, as compared with the conventional case in which the door is opened and closed and the processing object is taken in and out by human work, the thermal processing is very good and the decomposition speed is high, so that a large amount of the processing object can be processed. Since the crucible is not opened, the heat treatment can be performed at a relatively low temperature to reduce the running cost. Further, since harmful substances are removed by the cooling device, carbon dioxide and bad odor are not emitted to the outside.
Furthermore, by introducing nitrogen into the crucible, in combination with the suction force of the suction means, the vaporized harmful substance generated in the crucible can be easily taken out from the crucible.
In addition, the processed residue and the extracted substance become recycled materials, and not only the running cost is reduced, but also income such as consignment processing costs and secondary crystal sales sales is obtained. As a result, it is possible to simultaneously realize high processing capacity and complete recycling of waste containing harmful substances.
[Brief description of the drawings]
FIG. 1 is an overall partial cross-sectional view of a hazardous substance processing apparatus according to the present invention.
FIG. 2 is a partial cross-sectional overall configuration diagram of another hazardous substance processing apparatus according to the present invention.
3 is a cross-sectional view of a main part of FIG.
4 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
10 Body
30 crucibles
32 Spiral groove
36 Cooling members
40 First space
42 Second space
44 high frequency coil
46 Cooling means
48 Nitrogen charging means
50 screw
54 Raised board
56 spaces
58 Upper introduction member
60 Lower discharge member
78 Discharge tank
79 Switching valve
80 Connection pipe
81 Connection pipe
86a trap
86b trap
86c trap
90 Vacuum pump
94a trap
94b trap
94c trap
98 vacuum pump
106 screw
108 shaft
110 space
112 Contact hole
114 Nitrogen charging means

Claims (9)

A crucible for containing the object to be treated containing harmful substances, a heating means for heating the inside of the crucible to vaporize the harmful substances contained in the object to be treated, a suction means for generating a suction force, and vaporized A cooling device for liquefying and collecting harmful substances, provided between the suction means and the crucible, for liquefying the vaporized gas, and communicating with the inside of the crucible to be processed A transfer means for taking the material into and out of the crucible, an upper introduction member for feeding the object into the transfer means in a state that can be hermetically shut off from the outside, and a process in a state that can be shut off hermetically from the outside A lower discharge member for discharging an object from the transfer means, and a nitrogen input means for supplying nitrogen into the crucible, and the crucible, the cooling device, and the suction means are closed. Contact, suction force by the suction means Together with the via a cooling device so as on the crucible, is arranged on the opposite side of the exhaust transfer means and the input for the transfer means of the workpiece about said crucible, the closing for transferring about said crucible An apparatus for removing harmful substances , wherein the suction means is arranged on the opposite side of the means . The said transfer means has a shaft which forms a space inside, one end of the space of the shaft communicates with the crucible, and nitrogen from the nitrogen input means is input to the space. 1 hazardous substance removing apparatus according. A communication hole for connecting the outside of the shaft and the space is provided around the shaft, and nitrogen from the nitrogen input means is input to the space from the outside of the shaft through the communication hole. The hazardous substance removing device according to claim 2 . A crucible for containing the object to be treated containing harmful substances, a heating means for heating the inside of the crucible to vaporize the harmful substances contained in the object to be treated, a suction means for generating a suction force, and vaporized A cooling device for liquefying and collecting harmful substances, provided between the suction means and the crucible, for liquefying the vaporized gas, and communicating with the inside of the crucible to be processed A transfer means for taking the material into and out of the crucible, an upper introduction member for feeding the object into the transfer means in a state that can be hermetically shut off from the outside, and a process in a state that can be shut off hermetically from the outside A lower discharge member for discharging an object from the transfer means, and the crucible, the cooling device, and the suction means are connected in a closed state, and the suction force by the suction means is passed through the cooling device. In the crucible Wherein the rotation axis direction to the inner wall of the crucible to form a spiral groove, the crucible object to be treated the hazardous substance removing apparatus you and moving along the spiral groove by rotation of the. A scraping plate for dropping the object to be processed toward the transfer means is provided in the crucible, and the processed residue after vaporizing harmful substances from the object to be processed in the crucible is scanned with the scraping plate . 2. The hazardous substance removing device according to claim 1 , wherein the harmful substance removing device is dropped on a clew. A plurality of communication passages to be switched by the switching means in a position to contact with the said crucible cooling device provided, hazardous substance removing apparatus according to claim 1, characterized in that it comprises only a cooling device number of the communication passage. The hazardous substance removing device according to claim 1 , wherein the cooling device includes a plurality of devices connected in series via a communication pipe. A crucible for containing the object to be treated containing harmful substances, a heating means for heating the inside of the crucible to vaporize the harmful substances contained in the object to be treated, a suction means for generating a suction force, and vaporized A cooling device for liquefying and collecting harmful substances, provided between the suction means and the crucible, for liquefying the vaporized gas, and communicating with the inside of the crucible to be processed A transfer means for taking the material into and out of the crucible, an upper introduction member for feeding the object into the transfer means in a state that can be hermetically shut off from the outside, and a process in a state that can be shut off hermetically from the outside A lower discharge member for discharging an object from the transfer means, and the crucible, the cooling device, and the suction means are connected in a closed state, and the suction force by the suction means is passed through the cooling device. In the crucible Two cooling space provided on the outer peripheral portion of the crucible, nitrogen put together comprising said heating means one cooling space, hazardous substances you characterized by introducing cooling water into the other cooling space Removal device. A crucible for containing the object to be treated containing harmful substances, a heating means for heating the inside of the crucible to vaporize the harmful substances contained in the object to be treated, a suction means for generating a suction force, and vaporized A cooling device for liquefying and collecting harmful substances, provided between the suction means and the crucible, for liquefying the vaporized gas, and communicating with the inside of the crucible to be processed A transfer means for taking the material into and out of the crucible, an upper introduction member for feeding the object into the transfer means in a state that can be hermetically shut off from the outside, and a process in a state that can be shut off hermetically from the outside A lower discharge member for discharging an object from the transfer means, and the crucible, the cooling device, and the suction means are connected in a closed state, and the suction force by the suction means is passed through the cooling device. In the crucible The place and the upper introduction member and said lower discharge member to one side with respect to the crucible, said transfer means you characterized by taking out an object to be processed from the crucible with turning on the object to be processed in said crucible hazardous substance removal device.

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